/* TwelveWise landing page. System fonts only, no external assets. */
:root {
  color-scheme: light dark;
  --bg: #fbfaf7;
  --surface: #ffffff;
  --surface-2: #f2f0ea;
  --ink: #17201f;
  --muted: #4b5755;
  --line: #e2dfd6;
  --accent: #0f6b68;
  --on-accent: #ffffff;
  --accent-hover: #0b5755;
  --accent-2: #a14a08;
  --accent-2-soft: #f6e6d4;
  --accent-soft: #dcefed;
  --focus: #0b5ed7;
  --field-border: #7d8a87;
  --shadow: 0 1px 2px rgb(23 32 31 / 6%), 0 8px 24px rgb(23 32 31 / 6%);
  --radius: 14px;
  --wrap: 62rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1413;
    --surface: #162120;
    --surface-2: #1b2928;
    --ink: #e9efee;
    --muted: #a7b5b3;
    --line: #2a3a38;
    --accent: #5fd6c9;
    --on-accent: #04211f;
    --accent-hover: #86e4da;
    --accent-2: #f2b66b;
    --accent-2-soft: #3a2a14;
    --accent-soft: #123432;
    --focus: #8ab4ff;
    --field-border: #7f918f;
    --shadow: 0 1px 2px rgb(0 0 0 / 40%), 0 8px 24px rgb(0 0 0 / 30%);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 4.5rem; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}
img, svg { max-width: 100%; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 6px; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 1.25rem; }
section.wrap { padding-top: 4rem; padding-bottom: 1rem; }

/* Header */
.bar {
  display: flex; align-items: center; justify-content: space-between; gap: 0.75rem;
  padding-top: 1rem; padding-bottom: 1rem;
}
.brand { font-weight: 800; letter-spacing: -0.02em; font-size: 1.125rem; text-decoration: none; }
.bar nav a { white-space: nowrap; }
.bar nav { display: flex; align-items: center; gap: 0.25rem; font-size: 0.9375rem; }
.bar nav a:not(.btn) { padding: 0.5rem 0.625rem; text-decoration: none; color: var(--muted); border-radius: 8px; }
.bar nav a:not(.btn):hover { color: var(--ink); background: var(--surface-2); }

/* Buttons */
.btn {
  display: inline-block; background: var(--accent); color: var(--on-accent);
  padding: 0.75rem 1.25rem; border-radius: 999px; font-weight: 700; text-decoration: none;
  border: 0; font: inherit; font-weight: 700; cursor: pointer; line-height: 1.2;
  transition: background 0.15s, transform 0.15s;
}
.btn:hover { background: var(--accent-hover); }
.btn:active { transform: translateY(1px); }
.btn.small { padding: 0.5rem 0.875rem; font-size: 0.9375rem; }
.btn.ghost { background: transparent; color: var(--ink); box-shadow: inset 0 0 0 2px var(--line); }
.btn.ghost:hover { background: var(--surface-2); }

/* Type */
h1, h2, h3 { line-height: 1.12; letter-spacing: -0.025em; margin: 0; }
h1 { font-size: clamp(2.5rem, 9vw, 4.25rem); font-weight: 800; }
h2 { font-size: clamp(1.75rem, 5vw, 2.5rem); font-weight: 800; margin-bottom: 0.75rem; }
h3 { font-size: 1.1875rem; font-weight: 700; letter-spacing: -0.015em; margin-bottom: 0.375rem; }
.eyebrow {
  display: inline-block; margin: 0 0 1rem; padding: 0.25rem 0.75rem; border-radius: 999px;
  background: var(--accent-2-soft); color: var(--accent-2); font-size: 0.8125rem; font-weight: 700;
  letter-spacing: 0.04em; text-transform: uppercase;
}
.lead { font-size: clamp(1.125rem, 3.4vw, 1.375rem); color: var(--muted); max-width: 36em; margin: 1.25rem 0 0; }
.section-intro { color: var(--muted); max-width: 38em; margin: 0 0 2rem; font-size: 1.0625rem; }

/* Hero */
.hero { padding-top: 3.5rem; padding-bottom: 2rem; }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem; }
.weeks {
  display: grid; grid-template-columns: repeat(12, 1fr); gap: 0.375rem; margin-top: 3rem; max-width: 36rem;
}
.weeks span { height: 2.5rem; border-radius: 6px; background: var(--surface-2); box-shadow: inset 0 0 0 1px var(--line); }
.weeks span.done { background: var(--accent); box-shadow: none; }
.weeks span.now { background: var(--accent-2); box-shadow: none; }
.weeks-note { margin: 0.625rem 0 0; font-size: 0.875rem; color: var(--muted); }

/* Cards */
.grid { display: grid; gap: 1rem; grid-template-columns: 1fr; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.5rem; box-shadow: var(--shadow); position: relative; overflow: hidden;
}
.card p { margin: 0; color: var(--muted); }
.step-num {
  display: inline-grid; place-items: center; width: 2.25rem; height: 2.25rem; margin-bottom: 1rem;
  border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-weight: 800;
}
.screen { padding-top: 1.75rem; }
.screen::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 5px; background: var(--accent); }
.screen.two::before { background: var(--accent-2); }
.screen.three::before { background: var(--ink); opacity: 0.55; }
.screen h3 { font-size: 1.5rem; }

/* AI */
.ai-panel {
  display: grid; gap: 2rem; padding: 1.5rem; border-radius: calc(var(--radius) + 6px);
  background: var(--surface-2); border: 1px solid var(--line);
}
.ai-panel p { color: var(--muted); margin: 0 0 1rem; }
.ai-panel h2 { margin-bottom: 1rem; }
.ai-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.75rem; align-content: start; }
.ai-list li { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 1rem 1.125rem; }
.ai-list strong { display: block; }
.ai-list span { color: var(--muted); font-size: 0.9375rem; }
.ai-link { font-weight: 700; color: var(--accent); text-decoration: underline; text-underline-offset: 4px; text-decoration-thickness: 2px; }
.ai-link:hover { color: var(--accent-hover); }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.9em; overflow-wrap: anywhere; }

/* CTA + form */
section.wrap.cta { text-align: center; padding-top: 5rem; padding-bottom: 5rem; }
.cta h2 { margin-bottom: 1.5rem; }
.cta h3 { margin: 3rem 0 0.25rem; }
.cta .note { color: var(--muted); margin: 0 0 1rem; }
.signup { display: flex; flex-wrap: wrap; gap: 0.625rem; justify-content: center; max-width: 30rem; margin: 0 auto; }
.signup input {
  flex: 1 1 14rem; min-width: 0; padding: 0.75rem 1rem; border-radius: 999px;
  border: 1.5px solid var(--field-border); background: var(--surface); color: var(--ink); font: inherit;
}
.signup .hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; opacity: 0; }
.signup input::placeholder { color: var(--muted); opacity: 1; }
.signup input:focus-visible { outline-offset: 2px; }
.signup button {
  flex: 0 0 auto; background: var(--accent); color: var(--on-accent); padding: 0.75rem 1.25rem; border: 0;
  border-radius: 999px; font: inherit; font-weight: 700; line-height: 1.2; cursor: pointer;
  transition: background 0.15s, transform 0.15s;
}
.signup button:hover { background: var(--accent-hover); }
.signup button:active { transform: translateY(1px); }

/* Footer */
.foot {
  margin-top: 1rem;
  display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; justify-content: space-between;
  border-top: 1px solid var(--line); color: var(--muted); font-size: 0.875rem; padding-top: 1.5rem; padding-bottom: 2.5rem;
}
.foot nav { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.foot a { text-decoration: underline; text-underline-offset: 3px; }

/* Success page */
.done-page { min-height: 70vh; display: grid; align-content: center; justify-items: center; text-align: center; gap: 1rem; }
.done-page .lead { margin: 0; }

@media (max-width: 420px) {
  .bar { padding-left: 1rem; padding-right: 1rem; }
  .bar nav { gap: 0; }
  .brand { font-size: 1rem; }
  .bar nav a:not(.btn) { padding: 0.5rem 0.375rem; font-size: 0.8125rem; }
  .btn.small { padding: 0.5rem 0.75rem; font-size: 0.875rem; }
  .weeks { gap: 0.25rem; }
  .bar nav a[href="#how"] { display: none; } /* hero has its own How it works button */
}

@media (min-width: 48rem) {
  .wrap { padding: 0 2rem; }
  section.wrap { padding-top: 6rem; }
  .hero { padding-top: 5rem; }
  .grid { grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
  .ai-panel { grid-template-columns: 1.1fr 1fr; padding: 3rem; gap: 3rem; }
  .card { padding: 1.75rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
}